The maximum and minimum expected amplitude of input signal is an important factor in designing measuring equipment. To meet the measurement requirements, it must be sensitive enough to measure both the weakest signal and the range. UVLED output has steadily increased from just a few hundred milliwatts per square centimeter a few years ago to more than a dozen watts per square centimeter, or even dozens of watts today. High output power is also a challenge for radiometer.
Most conventional radiation energy meters measure only about 10 watts per square centimeter. Although most users mistakenly believe that leds are not as powerful as arc or microwave lamps, they are very strong in the narrow-band region. You may be familiar with clipping in audio applications, where loud spikes are artificially attenuated by the amplifier. When the equipment with insufficient measurement range is used for the measurement, the result will be clipping phenomenon of amplitude limit, so that the radiometric value is far less than the actual value, as shown in the figure below.

To design a suitable UV instrument, the engineer needs to predict the approximate range of light source energy. This is an engineering challenge in a market where the output power of the light source doubles every two years.
However, we do not need to fully optimize the high energy UVLED equipment. The only thing that matters is whether the chemical reaction can be carried out effectively.